Jeet Kune Do, also Jeet Kun Do, and abbreviated JKD, is an eclectic and hybrid martial art system and philosophy of life founded by the martial artist Bruce Lee (1940–1973) in 1967 with simple and direct, or straightforward, movements and non-classical style. Jeet Kune Do practitioners believe in minimal movements with maximum effects and extreme speed. The system works by using different "tools" for different situations, where the situations are divided into ranges, which is kicking, punching, trapping, and grappling, where martial artists use techniques to flow smoothly between them. It is referred to as "a style without style" or "the art of fighting without fighting" as said by Lee himself. Unlike more traditional martial arts, Jeet Kune Do is not fixed or patterned, and is a philosophy with guiding thoughts. It was named for the Wing Chun concept of interception or attacking while one's opponent is about to attack. However, the name Jeet Kune Do was often said by Lee to be just a name. He himself often referred it as "the art of expressing the human body" in his writings and in interviews. Through his studies Lee came to believe that styles had become too rigid and unrealistic. He called martial art competitions of the day "dry land swimming". He believed that combat was spontaneous, and that a martial artist cannot predict it, only react to it, and that a good martial artist should "be like water" and move fluidly without hesitation.